Monday Mutant 120: Polyominous / Tetra Firma

In this Polyominous puzzle, the rule that no two polyominoes of the same size may share an edge is specifically waived for tetrominoes, which must follow the rules of Tetra Firma (excluding the rule that every region contains a single tetromino). The number 4 never appears as a given in the grid; instead, the letters L, I, T, and S are given, corresponding to the shape of the tetromino.
I thought I clicked tomorrow's date. . . bah. You get this puzzle early.

In the past, I have plugged my board game Battle of LITS, which uses the LITS rules to create an original two-player game. Battle of LITS is now available on nestorbooster! 500 euros in pre-orders within the next month will allow Battle of LITS to become the next nestorgames publication! Without your pre-orders, though, this dream of mine will not happen. I hope you choose to help me get published with a meager 21 euro investment (which will be refunded if the funding fails). :)

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